Relationship between spat density, food availability, and growth of spawners in cultured Mizuhopecten yessoensis in Funka Bay: concurrence with El Niño Southern Oscillation

Autor:	Hisashi NittaH. Nitta, Rieko SugawaraR. Sugawara, Katsuhisa Baba, Akira Miyazono, Kiyoshi EndouK. Endou
Rok vydání:	2009
Předmět:	biology business.industry Aquatic animal Aquatic Science biology.organism_classification Bivalvia Fishery Gonadosomatic Index Aquaculture Scallop business Mollusca Bay Ecology Evolution Behavior and Systematics Shellfish
Zdroj:	Canadian Journal of Fisheries and Aquatic Sciences. 66:6-17
ISSN:	1205-7533 0706-652X
Popis:	To elucidate the factors that influence the interannual variation in the density of cultured Japanese scallop ( Mizuhopecten yessoensis ) spat, we analyzed the relationship between spat density (Ds), monthly chlorophyll a (chl a) concentration, water temperature, and adductor muscle weight of spawners over 15 years (1992–2006) in Funka Bay (Japan) on the western North Pacific Ocean. The interannual variation of spat density was best explained by a campaniform model that used chl a concentration in February ([chl]Feb) and a categorical variable that indicates whether growth of spawners in a year is low or not as independent variables (R2 = 0.91). The gonadosomatic index increased fastest in February. Low growth years were detected as outliers in the Ds – [chl]Feb relationship and were characterized by an average weight of adductor muscles in February of Feb and low growth. Those years corresponded with El Niño and La Niña years, respectively. Thus, global climatic anomalies apparently affect reproduction of the scallop in Funka Bay.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6eff6d0afdb426afe1cec41eadc26c44 https://doi.org/10.1139/f08-183 Zobrazit plný text záznamu Plný text ve formátu PDF